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Nuclear marine propulsion is propulsion of a ship or submarine with heat provided by a nuclear reactor. The power plant heats water to produce steam for a turbine used to turn the ship's propeller through a gearbox or through an electric generator and motor.
A nuclear submarine is a submarine powered by a nuclear reactor, but not necessarily nuclear-armed.In the US classification, nuclear-powered submarines are designated as SSxN, where the SS denotes submarine, x=G means that the submarine is equipped with guided missiles (usually cruise missiles), x=B means that the submarine is equipped with ballistic missiles (usually intercontinental) and the ...
In 1994, the core was replaced with an S6W reactor, designed for the then-new Seawolf-class submarine. The prototype is equipped with an automatic reactor fill system that can flood the reactor with borated water in the event of a loss-of-coolant accident. The S8G reactor is in use in Ohio Class Submarines and has a power rating of 26.1 MW. [5]
The S5W was the standard reactor for submarines of the United States Navy from its first use in 1959 on USS Skipjack until the introduction of the Los Angeles-class submarines with S6G reactor in the mid-1970s. One S5W plant was also used in the United Kingdom on the Royal Navy's first nuclear-powered submarine HMS Dreadnought. [1]
It could study and map the ocean bottom, including temperature, currents, and other information for military, commercial, and scientific uses. Its nuclear propulsion provided independence from surface support ships and essentially unlimited endurance. [1]: 3 NR-1 ' s size limited its crew comforts. The crew of about 10 men could stay at sea for ...
The land-based nuclear reactor was built at the National Reactor Testing Station, later called Idaho National Engineering Laboratory near Arco, Idaho. [1] The plant was the prototype for the power system of USS Nautilus (SSN-571) , the world's first nuclear-powered submarine, which used the improved S2W reactor .
This naval nuclear reactor is estimated to generate 210 megawatts (MWt) [3] driving a 30 MW pump-jet propulsion system built by BAE Systems that was designed for the Royal Navy [4] and entered service on the second Trafalgar-class submarine, also featured on the Astute-class submarines.
S = Submarine platform; 1 = First generation core designed by the contractor; B = Bechtel Marine Propulsion Corporation is the contracted designer; This pressurized water nuclear reactor, developed at the Knolls Atomic Power Laboratory, is designed to have increased energy density and to operate for 40 years without refueling.